TRAC DPM Conversion

I am considering converting our TRAC DPM with A.G.E. 3 controller to LinuxCNC. I have basic schematics of the wiring but very little info on the servos. I have removed one servo controller and attached a photo. Any help identifying these servos and how I should proceed is appreciated.

Do the schematics show what signals go to the motor drives?

Also a servo drive part number _might_ help though these dont seem very common

All the manual shows is 5 VDC and 115 VAC to the motors.

There are two part numbers for the motors X&Y servos are 20201, Z is 20327-2

Check out this link:
Looks like there is some information here that could help you.
-Jared

Thank you that link was very helpful.

So what I know of the pinout on the encoder is as follows

1 - PWM - 0-5V
2 - PWM - 0-5V
3 - Neutral
4 - ? - I can only read "S" on the board
5 - +5V

I would think it should be fairly easy to determine which PWM pin is the signal and which is the feed back.

Are you sure that is not just a standard quadarture encoder
1 - PWM - 0-5V A?
2 - PWM - 0-5V B?
3 - Neutral GND
4 - ? - I can only read "S" on the board INDEX?
5 - +5V

Can you point me to a case study using this type encoder with DC drives or recommend the cards I will require.

Jarard wrote:

Can you point me to a case study using this type encoder with DC drives or recommend the cards I will require.

There are many (1000's) of LinuxCNC retrofits to DC and AC servo machines but its still not clear what encoder types and drive types you have.

As a first step, I would check the signals from the encoders with a voltmeter to see if they are TTL square wave (likely quadrature) or perhaps analog sine/cosine.

The motor drive _looks_ like a analog input servo drive but its pretty hard to tell without more information

Best I could do is measure the voltage of the signal during a jog. The multi-meter I have is limited so I took measurements using both the DC and AC settings as follows:

Slow jog: DC 2.4V AC 2.45V

Fast jog: DC 1.76V AC 1.67V

Not sure how to determine the type of wave without a scope.

Can you measure the signals when stopped? that would be more valuable